Do not let heat stop you from starting. Prolong your starter's life and improve its performance. The starter shields help prevent starter failure caused by overheating. Quality construction and design allow for easy installation. Simply wrap the cover around the starter and fasten with the hook and loop fasteners. Starter removal is not necessary in most cases. Two different sizes available, which makes trimming unnecessary. The heavy-duty cover is double insulated to offer a greater reduction of radiant heat transfer. The standard shields are aluminized cloth construction to reflect radiant heat away.